+static int raid_message(struct dm_target *ti, unsigned argc, char **argv)
+{
+ struct raid_set *rs = ti->private;
+ struct mddev *mddev = &rs->md;
+
+ if (!strcasecmp(argv[0], "reshape")) {
+ DMERR("Reshape not supported.");
+ return -EINVAL;
+ }
+
+ if (!mddev->pers || !mddev->pers->sync_request)
+ return -EINVAL;
+
+ if (!strcasecmp(argv[0], "frozen"))
+ set_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
+ else
+ clear_bit(MD_RECOVERY_FROZEN, &mddev->recovery);
+
+ if (!strcasecmp(argv[0], "idle") || !strcasecmp(argv[0], "frozen")) {
+ if (mddev->sync_thread) {
+ set_bit(MD_RECOVERY_INTR, &mddev->recovery);
+ md_reap_sync_thread(mddev);
+ }
+ } else if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) ||
+ test_bit(MD_RECOVERY_NEEDED, &mddev->recovery))
+ return -EBUSY;
+ else if (!strcasecmp(argv[0], "resync"))
+ set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
+ else if (!strcasecmp(argv[0], "recover")) {
+ set_bit(MD_RECOVERY_RECOVER, &mddev->recovery);
+ set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
+ } else {
+ if (!strcasecmp(argv[0], "check"))
+ set_bit(MD_RECOVERY_CHECK, &mddev->recovery);
+ else if (!!strcasecmp(argv[0], "repair"))
+ return -EINVAL;
+ set_bit(MD_RECOVERY_REQUESTED, &mddev->recovery);
+ set_bit(MD_RECOVERY_SYNC, &mddev->recovery);
+ }
+ if (mddev->ro == 2) {
+ /* A write to sync_action is enough to justify
+ * canceling read-auto mode
+ */
+ mddev->ro = 0;
+ if (!mddev->suspended)
+ md_wakeup_thread(mddev->sync_thread);
+ }
+ set_bit(MD_RECOVERY_NEEDED, &mddev->recovery);
+ if (!mddev->suspended)
+ md_wakeup_thread(mddev->thread);
+
+ return 0;
+}
+
+static int raid_iterate_devices(struct dm_target *ti,
+ iterate_devices_callout_fn fn, void *data)